U.S. patent number 5,760,749 [Application Number 08/525,737] was granted by the patent office on 1998-06-02 for antenna integral-type transmitter/receiver system.
This patent grant is currently assigned to Fujitsu Limited. Invention is credited to Yuichi Hagiwara, Masahiko Kaneko, Toshimitsu Kobayashi, Kazuo Kumahara, Yoshiaki Minowa.
United States Patent |
5,760,749 |
Minowa , et al. |
June 2, 1998 |
Antenna integral-type transmitter/receiver system
Abstract
An antenna integral-type transmitter/receiver system to be
installed outdoors and used for transmission and reception of radio
signals. The object is to provide a small, lightweight antenna
integral-type transmitter/receiver system formed of the reduced
number of parts and assembling steps. The antenna integral-type
transmitter/receiver system consists of a housing having one end
surface in which an opening is formed and the other end surface in
which an antenna mounting surface is formed, and including a
transmitter/receiver function unit formed of a waveguide circuit
unit, a high-frequency electrical circuit unit, and an intermediate
frequency electrical circuit unit; an antenna connected to the
transmitter/receiver function unit mounted on the other end surface
of the housing; and a cover member for closing the opening of the
one end surface of the housing. The waveguide circuit unit and the
high-frequency electrical circuit unit form a first unit. The
intermediate frequency electrical circuit unit forms a second unit.
The first unit and the second unit are arranged so as to be stacked
in the housing.
Inventors: |
Minowa; Yoshiaki (Kawasaki,
JP), Kumahara; Kazuo (Kawasaki, JP),
Hagiwara; Yuichi (Kawasaki, JP), Kobayashi;
Toshimitsu (Kawasaki, JP), Kaneko; Masahiko
(Kawasaki, JP) |
Assignee: |
Fujitsu Limited (Kawasaki,
JP)
|
Family
ID: |
12764059 |
Appl.
No.: |
08/525,737 |
Filed: |
September 25, 1995 |
PCT
Filed: |
September 29, 1994 |
PCT No.: |
PCT/JP94/01621 |
371
Date: |
September 25, 1995 |
102(e)
Date: |
September 25, 1995 |
PCT
Pub. No.: |
WO95/25387 |
PCT
Pub. Date: |
September 21, 1995 |
Foreign Application Priority Data
|
|
|
|
|
Mar 17, 1994 [JP] |
|
|
6-047040 |
|
Current U.S.
Class: |
343/772; 343/786;
343/882 |
Current CPC
Class: |
H01Q
13/00 (20130101); H01Q 19/13 (20130101); H01Q
23/00 (20130101); H04B 1/38 (20130101) |
Current International
Class: |
H01Q
19/13 (20060101); H01Q 13/00 (20060101); H01Q
23/00 (20060101); H01Q 19/10 (20060101); H04B
1/38 (20060101); H01Q 013/00 () |
Field of
Search: |
;343/772,775,786,765,878,882 |
References Cited
[Referenced By]
U.S. Patent Documents
Other References
K Taniguchi et al. "Shielding Structure of Mobile Phoen", Japanese
Patent Laid-Open (kokai) No. HEI 5-29785 Laid-Open Date: Feb. 5,
1993. .
Y. Nonaka "Portable Reception Antenna System", Japanese Patent
Laid-Open (kokai) No. HEI 1-12702 Laid-Open Date: Jan. 17, 1989.
.
K. Omiya et al. "Electronic Circuit with Plane Antenna", Japanese
Patent Laid-Open (kokai) No. HEI 2-244803 Laid-Open Date: Sep. 28,
1990. .
F. Ogata et al. "Radio Communication Equipment", Japanese Patent
Laid-Open (kokai) No. SHO 60-126929 Laid-Open Date: Jul. 6, 1985.
.
S. Ueno "Polarized Wave Plane Switching Display Unit for Primary
Radiator", Japanese Patent/Utility Model Laid-Open (kokai) No. HEI
3-84601 Laid-Open Date: Aug. 28, 1991. .
M. Washimi "Unit Mounting Structure for Communications Equipment",
Japanese Patent/Utility Model Laid-Open (kokai) No. HEI 2-41584
Laid-Open Date: Mar. 22, 1990. .
R. Yamamoto et al. "Harmonic Device", Japanese Patent/Utility Model
Laid-Open (kokai) No. SHO 63-106197 Laid-Open Date: Jul. 8, 1988.
.
T. Kamimura "Polarized Wave Selector for Primary Radiator",
Japanese Patent/Utility Model Laid-Open (kokai) No. HEI 3-128301
Laid-Open Date: Dec. 23, 1991. .
K. Katsurada "Heater Mounting Structure", Japanese Patent/Utility
Model Laid-Open (kokai) No. SHO 63-132498 Laid-Open Date: Aug. 30,
1988. .
K. Kumahara et al. "Outdoor Storage Container for Radio Equipment",
Japanese Patent/Utility Model Laid-Open (kokai) No. SHO 60-142542
Laid-Open Date: Sep. 20, 1985. .
F. Ogata et al. "Antenna Supporting Device", Japanese
Patent/Utility Model Laid-Open (kokai) No.SHO 58-101509 Laid-Open
Date: Jul. 11, 1983..
|
Primary Examiner: Hajec; Donald T.
Assistant Examiner: Ho; Tan
Attorney, Agent or Firm: Armstrong, Westerman, Hattori,
McLeland & Naughton
Claims
We claim:
1. An antenna integral-type transmitter/receiver system
comprising:
a housing (5) having one end surface in which an opening (5B) is
formed and the other end surface in which an antenna mounting
surface (5A) is formed, and including a transmitter/receiver
function unit (13) formed of a waveguide circuit unit (8), a
high-frequency electrical circuit unit (2), and an intermediate
electrical circuit unit (3) inside the housing;
an antenna (7) connected to said transmitter/receiver function unit
(13) mounted on the other end surface of said housing (5); and
a cover member (6) for closing the opening (5B) of the one end
surface of said housing (5);
said waveguide circuit unit (8) and said high-frequency electrical
circuit unit (2) forming a first unit (10),
said intermediate electrical circuit unit (3) forming a second unit
(11),
said first unit (10) and said second unit (11) being arranged so as
to be stacked in said housing (5),
wherein the electrical circuit unit in each of said first unit (10)
and said second unit (11) is arranged on a common printed wiring
board (12).
2. The antenna integral-type transmitter/receiver system according
to claim 1, wherein said printed wiring board (12) and said
waveguide circuit unit (8) are arranged in said housing in the
order of said printed wiring board (12) and said waveguide circuit
unit (8), and wherein said waveguide circuit unit (8) is connected
to said antenna (7) via said opening (14) formed in the middle
portion of said printed wiring board (12).
3. The antenna integral-type transmitter/receiver system according
to claim 1, wherein said waveguide circuit unit (8) and said
printed wiring board (12) are arranged in said housing (5) in the
order of said waveguide circuit unit (8) and said printed wiring
board (12).
4. The antenna integral-type transmitter/receiver system according
to any one of claims 1, 2 or 3, wherein said high-frequency
electrical circuit unit (2) and said waveguide circuit unit (8) are
arranged coaxially around a waveguide input/output unit (8D)
connected to said antenna (7) in said waveguide circuit unit (8)
and wherein said intermediate frequency electrical circuit unit (3)
and power supply unit (4) are arranged outside said high-frequency
electrical circuit unit (2) and said waveguide circuit unit
(8).
5. The antenna integral-type transmitter/receiver system according
to claim 1, wherein said housing (5) has its vertically and
horizontally symmetrical outline and can be rotated at 90.degree.
to perform a horizontal/vertical conversion while the housing (5)
is attached with said antenna (7).
6. The antenna integral-type transmitter/receiver system according
to claim 1, further comprising a shield cover formed on the fixture
surface of said printed wiring board (12) in said housing (5), said
shield cover having a trench, groove (5C), or separation unit (5D)
to relieve parts or leads assembled on said printed wiring board
(12).
7. The antenna integral-type transmitter/receiver system according
to claim 1, wherein said printed wiring board (12) is assembled
inside said housing (5) via a base member (17).
8. The antenna integral-type transmitter/receiver system according
to claim 7, wherein said base member (17) has a trench, groove
(5C), or separation unit (5D) which relieves parts or leads
assembled on said printed wiring board (12), said base member (17)
acting as a shield cover.
9. The antenna integral-type transmitter/receiver system according
to claim 1, wherein the antenna mounting surface (5A) of said
housing (5) is used as a ground conductor and a base plate for a
plane antenna (7A).
10. The antenna integral-type transmitter/receiver system according
to claim 1, wherein said antenna mounting surface (5A) of said
housing (5) is used as a main reflector of a parabola antenna.
11. The antenna integral-type transmitter/receiver system according
to claim 1, further comprising a sheet heater (18) arranged inside
said cover member (6).
12. The antenna integral-type transmitter/receiver system according
to claim 1, further comprising an external interface connector (15)
and a positional alignment member (16) arranged on an outer side
surface of said housing (5) coaxially with respect to the antenna
mounting center portion (O) and over a diagonal line (L) crossing
said housing from the end surface to end surface.
13. The antenna integral-type transmitter/receiver system according
to claim 1, wherein said housing (5) and said cover member (6) are
made of a good conductive and good refractory member.
14. The antenna integral-type transmitter/receiver system according
to claim 1, further comprising a device mounting fitment (20)
arranged between said housing (5) and said antenna (7).
15. The antenna integral-type transmitter/receiver system according
to claim 14, further comprising a device support member (21) for
supporting said housing (5) via said device mounting fitment (20),
and an attitude adjusting member (25) mounted on said device
support member (21) for adjusting the attitude of said antenna (7)
and said housing (5).
16. The antenna integral-type transmitter/receiver system according
to claim 1, further comprising a device support member (21A)
mounted on said housing (5) for supporting said housing (5) and
said antenna (7), and an attitude adjusting unit (25A) mounted on
said device support member (21A) for adjusting the attitude of said
housing (5) and said antenna (7).
17. The antenna integral-type transmitter/receiver system according
to claim 1, further comprising a sunshade cover (23) mounted on
said housing (5) for covering said housing (5).
18. The antenna integral-type transmitter/receiver system according
to claim 1, wherein a through opening corresponding to a waveguide
is formed in the antenna mounting surface (5A) of said housing (5),
said through opening acting as the device input/output unit
(8D).
19. The antenna integral-type transmitter/receiver system
comprising:
a housing (105) having an opening (105A) formed on one end surface
thereof and including internally an intermediate frequency
electrical circuit portion (3);
a base plate (117) which closes one end surface of said housing,
said base plate on which a waveguide circuit unit (8) and a
high-frequency electrical circuit unit (2) forming a transmission
and reception function unit are mounted on the side surface of said
housing (105), together with said intermediate frequency electrical
circuit unit 3, said base plate having an antenna mounting surface
(117A) formed on the opposite side surface to said housing (105);
and
an antenna (7) connected to said waveguide circuit unit (8) on said
antenna mounting surface (117A) of said base plate (117).
20. The antenna integral-type transmitter/receiver system according
to claim 19, wherein a through opening (80) corresponding to said
waveguide (8C) is formed on said antenna mounting surface (117A) in
said base plate (117), said through opening (80) acting as a device
input/output portion (8D).
21. The antenna integral-type transmitter/receiver system according
to claim 19, wherein said antenna mounting surface (117A) of said
base plate (117) is formed as a device mounting fixture portion
(90).
22. The antenna integral-type transmitter/receiver system according
to claim 19, wherein said housing (105) is made of a synthetic
resin housing (105); and wherein said device mounting fixture
portion (90) is mounted on said antenna mounting surface (117A) of
said base plate (117) which covers the opening (105A) of said
housing (105).
23. The antenna integral-type transmitter/receiver system according
to claim 19, wherein a display window (60) is formed on the end
surface facing the end surface of said opening (105A) in said
housing (105); and wherein said housing (105) includes a display
unit (70) for displaying through said display window (60).
24. An antenna integral-type transmitter/receiver system
comprising:
a housing (5) having one end surface in which an opening (5B) is
formed and the other end surface in which an antenna mounting
surface (5A) is formed, and including a transmitter/receiver
function unit (13) formed of a waveguide circuit unit (8), a
high-frequency electrical circuit unit (2), and an intermediate
electrical circuit unit (3) inside the housing;
an antenna (7) connected to said transmitter/receiver function unit
(13) mounted on the other end surface of said housing (5); and
a cover member (6) for closing the opening (5B) of the one end
surface of said housing (5),
said waveguide circuit unit (8) and said high-frequency electrical
circuit unit (2) forming a first unit (10),
said intermediate electrical circuit unit (3) forming a second unit
(11),
said first unit (10) and said second unit (11) being arranged so as
to be stacked in said housing (5),
wherein said high-frequency electrical circuit unit (2) and said
waveguide circuit unit (8) are arranged coaxially around a
waveguide input/output unit (8D) connected to said antenna (7) in
said waveguide circuit unit (8), and
wherein said intermediate frequency electrical circuit unit (3) and
power supply unit (4) are arranged outside said high-frequency
electrical circuit unit (2) and said waveguide circuit unit (8).
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an antenna integral-type
transmitter/receiver system that is chiefly installed outdoors for
use in transmitting and receiving radio signals.
2. Description of the Related Art
Generally, there are antenna integral-type transmitter/receiver
systems each integrally formed of an antenna 7 and a
transmitter/receiver system body 1, as shown in FIG. 28, acting as
submilliwave or milliwave band radio equipment used for subscriber
radio or the like.
Two sets of radio equipment, as shown in FIG. 27, are respectively
installed facing each other on the two remote buildings 40 and 41,
for example, and are used as means for performing mutual
communications between two buildings 40 and 41. This radio
equipment may be used for a variety of applications other than
communication means between two buildings 40 and 41.
The antenna integral-type transmitter/receiver system has its
internal configuration as shown in FIG. 29. The
transmitter/receiver system body 1 consists of a high-frequency
electrical circuit unit (RF unit) 2, an intermediate frequency
electrical circuit unit (IF unit) 3, a power supply unit (PS unit)
4, a case 5 acting as a housing, and a cover member 6.
The main electrical circuit units 2, 3, and 4 are independently
housed as respective units for insertion into or extraction out of
the case 5. Thus an exchange can be made to each of the printed
wiring boards for the main circuit units. If the
transmitter/receiver system body 1 is maintained, inspected, or
repaired, an abnormal circuit is exchanged for the whole unit.
Referring to FIG. 29, numeral 15 represents an external interface
connector.
Moreover, as shown in FIG. 30, in the antenna integral-type
transmitter/receiver system, a horizontal/vertical conversion
waveguide (VH conversion waveguide) 44 is mounted at the juncture
of the antenna (this figure showing an example in which an
axially-symmetrical parabola antenna is used as an antenna 7) 7 and
the waveguide input/output unit 8D. This VH conversion waveguide 44
implements a horizontal/vertical polarized wave conversion. FIG. 31
illustrates an example of a horizontal (H) conversion and an
example of a vertical (V) conversion. That is, in the case of the
horizontal conversion, three members 44a, 44b, and 44c each with
the opening having a gradual different angle are overlapped with
each other. In the case of the vertical conversion, the member 44d
is used which has an opening whose angle is not twisted and a
thickness corresponding to the total thickness of, for example, the
three members 44a, 44b, and 44c.
It is required that the radio equipment is, in nature, at low
price, easy to be handled, and can be installed anywhere. Hence, it
has been strongly desired that the radio equipment is small in
size, lightweight, and low in cost.
With the device down-sized and manufactured at low cost, it is
becoming mainstream that in order to reduce markedly working hours,
the whole device is replaced, rather than that a defect spot is
checked with maintenance tools at a failure time and then the
defect unit is replaced for a new one. Hence there is a decreasing
need for dividing the internal unit.
On the other hand, in the device shown in FIG. 29, the RF unit 2,
the IF unit 3, and the PS unit 4 each made in a united form
increase the number of parts and assembling steps, so that the
increased number of the assembling steps decreases the
manufacturing efficiency (or occurring the so-called division
loss). Moreover, the difficulty in converting circuits into a LSI
or MMIC form impedes a device miniaturization.
The present invention overcomes the above mentioned problems. An
object of the present invention is to provide a small, lightweight
antenna integral-type transmitter/receiver system which realizes
the reduced number of parts and assembling steps.
SUMMARY OF THE INVENTION
For that reason, according to the present invention, the antenna
integral-type transmitter/receiver system is characterized by a
housing having one end surface in which an opening is formed and
the other end in which an antenna mounting surface is formed, and
including a transmitter/receiver function unit formed internally of
a waveguide circuit unit, a high-frequency electrical circuit unit,
and an intermediate electrical circuit unit; an antenna connected
to the transmitter/receiver function unit mounted on the other
surface of the housing; and a cover member for closing the opening
of the one end surface of the housing; the waveguide circuit unit
and the high-frequency electrical circuit unit forming a first
unit; the intermediate electrical circuit unit forming a second
unit; the first unit and the second unit being arranged so as to be
stacked in the housing.
The housing member closes the opening of one end surface of the
cover while it allows the antenna to be connected to the
transmitter/receiver function unit and to be mounted on the other
end surface of the housing.
Moreover, the electrical circuit unit in each of the first unit and
the second unit may be arranged on a common printed wiring board.
This arrangement allows the entire equipment to be reduced in
size.
Moreover, the printed wiring board and the waveguide circuit unit
are arranged in the housing in the order of the printed wiring
board and the waveguide circuit unit, and the waveguide circuit
unit may be connected to the antenna via the opening formed in the
middle portion of the printed wiring board.
The waveguide circuit portion and the printed wiring board may be
arranged in the housing in the order of the waveguide circuit unit
and the printed wiring board. This arrangement realizes the
small-sized equipment.
Furthermore, the high-frequency electrical circuit unit and other
waveguide circuit unit may be arranged coaxially around a waveguide
input/output unit connected to the antenna in the waveguide circuit
unit and the intermediate electrical circuit unit and the power
supply unit are arranged outside the high-frequency electrical
circuit unit and other waveguide circuit unit.
The housing has its vertically and horizontally symmetrical outline
and can be rotated 90.degree. to perform a horizontal and vertical
conversion while the housing is attached to the antenna. The
vertical and horizontal conversion can be performed by rotating the
whole housing with the antenna 90.degree..
A shield cover may be formed on the fixture surface of the printed
wiring board in the housing, the shield cover having a trench,
groove, or separation unit to relieve parts or leads assembled on
the printed wiring board. The trench, groove, or separation unit
ensures the clearance of the mounted parts or leads assembled on
the printed wiring board and the housing acts as a shield
cover.
The printed wiring board may be assembled inside the housing via a
base member. In this case, the base plate functions as a shield
cover.
The base member has a trench, groove, or separation unit which
relieves parts or leads assembled on the printed wiring board, the
base member acting as a shield cover. Hence, the housing can be
shared by changing the base member, together with modification of
the printed wiring board.
The antenna mounting surface of the housing may be used as a ground
conductor and a base plate for a plane antenna.
Moreover, the antenna mounting surface of the housing may be used
as a main reflector of a parabola antenna.
A sheet heater may be arranged inside the cover member. In this
case, warming the electrical components inside the system enables
the use in cold-weather areas. The general specifications and the
cold-weather area specifications can be prepared merely by
replacing the cover member.
An external interface connector and a positional alignment member
may be arranged on an outer side surface of the housing coaxially
with respect to the antenna mounting center portion and over a
diagonal line crossing the housing from the end surface to end
surface. In this form, the horizontal/vertical polarized wave
conversion can be performed by rotating the system body 90.degree.,
without significantly changing the external appearance.
The housing and the cover member may be made of a good conductive
and good refractory member. The system can be installed at any
place.
Furthermore, a device fitment may be arranged between the housing
and the antenna.
A device support member for supporting the housing via the device
fitment may be prepared, and an attitude adjusting unit may be
mounted on the device support member for adjusting the attitude of
the antenna and the housing. In this construction, the device
support member supports the housing via the device fitment, and the
attitude adjusting unit adjusts the attitudes of the housing and
the antenna.
A device support member mounted on said housing for supporting the
housing and the antenna may be prepared, and an attitude adjusting
unit may be mounted on the device support member for adjusting the
attitude of the housing and the antenna. Thus, the housing and the
antenna are supported. The attitude adjusting unit arranged on the
device support member adjusts the attitude of the housing and the
antenna.
A sunshade cover may be mounted on said housing for covering the
housing.
A through-opening corresponding to a waveguide may be formed in the
antenna mounting surface of the housing, the through opening acting
as the device input/output unit. The waveguide can be fitted to the
housing via the through-opening.
According to the present invention, the antenna integral-type
transmitter/receiver system is characterized by a housing having an
opening formed on one end surface thereof and including internally
an intermediate electrical circuit portion; a base plate which
closes one end surface of the housing, said base plate on which a
waveguide circuit unit and a high-frequency electrical circuit unit
forming a transmission and reception function unit are mounted on
the side surface of the housing, together with the intermediate
electrical circuit unit, the base plate having an antenna mounting
surface formed on the opposite side surface to the housing; and an
antenna connected to the waveguide circuit unit on the antenna
mounting surface of the base plate.
In such a construction, the intermediate frequency electrical
circuit unit is arranged inside the housing with one end surface in
which an opening is formed. The base plate closes one end surface
of the housing. The waveguide circuit unit and the high-frequency
electrical circuit unit forming the transmitter/receiver function
unit, together with the intermediate frequency electrical circuit
unit, are mounted on the side surface of the base plate facing the
housing. The antenna mounting surface is formed on the side
opposite the housing. The antenna mounted on the antenna mounting
surface of the base plate is connected to the waveguide circuit
unit.
In this case, a through-opening corresponding to the waveguide is
formed on the antenna mounting surface in the base plate, the
through-opening acting as a device input/output portion.
The antenna mounting surface of the base plate may be formed as a
device mounting fixture portion. This device mounting fixture unit
allows the system to be mounted securely.
The housing may be formed as a synthetic resin housing and the
device mounting fixture portion may be mounted on the antenna
mounting surface of the base plate which covers the opening of the
housing.
Furthermore, a display window may be formed on the end surface
facing the end surface of the opening in the housing; and the
housing may include a display unit for displaying through the
display window. The display unit arranged inside the housing
displays via the display window formed on the end surface facing
the opening forming end surface of the housing.
BRIEF DESCRIPTION OF DRAWINGS
FIGS. 1 to 11 show an antenna integral-type transmitter/receiver
system according to the first embodiment of the present
invention.
FIG. 1 is a disassembled perspective view schematically
illustrating the entire system configuration;
FIG. 2 is a plan view schematically illustrating the internal
configuration;
FIG. 3 is a cross-sectional view schematically illustrating the
configuration taken along the line 3--3 shown in FIG. 2;
FIG. 4(a) is a schematic diagram used for explaining the vertical
conversion procedure;
FIG. 4(b) is a schematic diagram used for explaining the horizontal
conversion procedure;
FIG. 5 is a perspective view schematically illustrating the entire
system to explain a conversion procedure of the vertical and
horizontal polarized waves;
FIG. 6(a) is a schematic diagram used for explaining the vertical
conversion procedure;
FIG. 6(b) is a schematic diagram used for explaining the horizontal
conversion procedure;
FIG. 7 is an electrical circuit diagram showing the configuration
of the main electrical circuit unit;
FIG. 8 is a cross-sectional view schematically illustrating the
first modified embodiment corresponding to FIG. 3;
FIG. 9 is a cross-sectional view schematically illustrating the
second modified embodiment, corresponding to FIG. 3;
FIG. 10 is a cross-sectional view schematically illustrating the
third modified embodiment, corresponding to the cross-sectional
view taken along the line B--B shown in FIG. 2;
FIG. 11 is a cross-sectional view schematically illustrating the
fourth modified embodiment, corresponding to FIG. 3;
FIG. 12 is a disassembled perspective view schematically
illustrating the entire configuration of the antenna integral-type
transmitter/receiver system, according to the second embodiment of
the present invention;
FIG. 13 is a cross-sectional view schematically illustrating the
internal configuration of the antenna integral-type
receiver/transmitter system according to the third embodiment of
the present invention, corresponding to FIG. 3; and
FIG. 14 is a perspective view schematically illustrating the entire
configuration of the antenna integral-type receiver/transmitter
system according to the fourth embodiment of the present
invention.
Each of FIGS. 15 to 19 is used to explain an installation example
of the antenna integral-type transmitter/receiver system according
to the first embodiment of the present invention.
FIG. 15 is a disassembled perspective view used for explaining the
first installation example;
FIG. 16 is a side view used for explaining the first installation
example;
FIG. 17 is a perspective view used for explaining the second
installation example;
FIG. 18(a) is a perspective view used for explaining the third
installation example;
FIG. 18(b) is a disassembled perspective view used for explaining
the structure of a fitment for the third installation example;
and
FIG. 19 is a perspective view used for explaining the fourth
installation example.
Each of FIGS. 20 to 26 shows the antenna integral-type
transmitter/receiver system according to the fifth embodiment of
the present invention.
FIG. 20 is a disassembled perspective view schematically
illustrating the entire configuration;
FIG. 21 is a cross-sectional view schematically illustrating the
internal configuration;
FIG. 22 is a cross-sectional view schematically illustrating the
internal configuration;
FIG. 23 is a front view illustrating the external appearance;
FIG. 24 is a rear view illustrating the external appearance;
FIG. 25 is a cross-sectional view partially illustrating the
internal configuration;
FIG. 26 is a cross-sectional view partially illustrating the
modified embodiment;
FIG. 27 is a schematic view of the antenna integral-type
transmitter/receiver system in use;
FIG. 28 is a perspective view schematically illustrating the
antenna integral-type transmitter/receiver system;
FIG. 29 is a disassembled perspective view schematically
illustrating the internal configuration of the antenna
integral-type transmitter/receiver system;
FIG. 30 is a cross-sectional view schematically illustrating the
configuration of the antenna integral-type transmitter/receiver
system; and
FIG. 31 is a schematic diagram used for explaining the
horizontal/vertical polarized conversion procedure in the antenna
integral-type transmitter/receiver system.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
(a) Explanation of the first embodiment:
FIG. 1 is a disassembled perspective diagram showing schematically
the entire structure of an antenna integral-type
transmitter/receiver system according to the first embodiment of
the present invention. As shown in FIG. 1, this system consists of
a transmitter/receiver system body 1 and an antenna 7 integrally
mounted to the transmitter/receiver system body 1. The
transmitter/receiver system body 1 consists of a RF unit 2 acting
as a high-frequency electrical circuit unit, an IF unit 3 acting as
an intermediate frequency electrical circuit unit, a PS unit 4
acting as a power supply unit, a waveguide circuit unit 8, a case 5
acting as a housing, and a cover member 6.
The waveguide circuit unit 8 is formed of a circulator (CIR) 8A, a
waveguide filter 8B, and an antenna connecting waveguide 8C. The RF
unit 2, the IF unit 3, and the waveguide circuit unit 8 provide a
transmitter/receiver function unit 13. The antenna 7 is connected
to the transmitter/receiver function unit 13.
The case 5, as shown in FIG. 2, is formed nearly in a square, in
the plan view. As shown in FIG. 3, an antenna mounting surface 5A
is formed on one end surface of the case 5. An opening 5B is formed
on the other end of the case 5. The RF unit 2, the IF unit 3, the
PS unit 4, and the waveguide circuit unit 8 are housed within the
case 5.
The waveguide circuit unit 8 and the RF unit 2 form the first unit
10. The IF unit 3 forms the second unit 11. As shown in FIGS. 1 and
3, the first unit 10 and the second unit 11 are arranged in a
stacked form within the case 5 in the transmitter/receiver system
body 1.
In the system body, the bias electrical circuit unit to be
positioned on the back surface side of the RF unit 2 and the IF
unit 3, and the PS unit 4 are integrally arranged on a single
printed wiring board 12. That is, the electrical circuit units of
the first unit 10 and the second unit 11 are arranged on the common
printed wiring board 12. Conductors for the main electrical circuit
units 2, 3, and 4 are put together on the single printed wiring
board 12.
In this example, the condition in which the printed wiring board 12
and the waveguide circuit unit 8 are housed is shown in FIGS. 1 and
3. They are arranged within the case 5, in the order of the printed
wiring board 12 and the waveguide circuit unit 8 from the side of
the antenna mounting surface 5A of the case 5. The RF unit 2 is
mounted under the waveguide circuit unit 8.
An opening 14 is formed in the middle portion of the printed wiring
board 12. The waveguide circuit unit 8 is connected to the antenna
7 through the opening 14. Namely, a waveguide input/output unit 8D,
as shown in FIG. 3, is formed at the end of the antenna connecting
waveguide 8C of the waveguide circuit unit 8. The antenna 7 is
connected to the waveguide input/output unit 8D through the opening
14.
In the system, as shown in FIGS. 1 and 2, the RF unit 2 and the
waveguide circuit unit 8 are arranged around the waveguide
input/output unit 8D being the center thereof, in the plan view.
Moreover, the IF unit 3 and the PS unit 4 are arranged outside the
above-mentioned parts. The IF unit 3 and the PS unit 4 have
input/output connectors each connected with, for example, a
cable.
The electrical circuit units of the first unit 10 and second unit
11 are arranged, if necessary, with metal shield covers covering
the circuit components.
The electrical circuit configuration of each of the RF unit 2, the
IF unit 3, and the PS unit 4 will be explained with, for example,
FIG. 7.
The IF unit 3 includes the AGC (automatic gain control unit) 33 on
the transmission side and the AGC 37 on the receiving side. The IF
unit 3, the PS unit (power supply unit) 4, and a given control unit
(including a bias electrical circuit unit for the RF unit 2) are
arranged on the common printed wiring board 12.
The RF unit 2 consists of a U/C (up converter) 34, a HPA
(high-power amplifier) 35, a circulator 8A, a LNA (low noise
amplifier) 38, a D/C (down converter) 39, and a LO (local
oscillator) 42. These elements are formed on the MIC (micro-IC)
substrate and arranged in the housing for the RF unit 2. The
electrical connection to the waveguide filter 8B is made by
connecting a micro-strip line waveguide modulation circuit to the
waveguide filter 8B. The space within the RF housing is
electrically cut to prevent electrical interference between
circuits.
Indoor equipment 31 is arranged separately to the
transmitter/receiver system body 1. At a transmission time, the MOD
(modulation unit) 32 on the side of the indoor equipment 31
modulates signals to input to the IF unit 3 on the side of the
transmitter/receiver body 1.
The AGC 33 adjusts the gain of the signal and then the U/C 34 in
the RF unit 2 converts the frequency of the IF signal into the
submillimeter or millimeter band. The signal also is amplified by
the HPA 35 and then transmitted from the antenna 7 via the
circulator 8A.
The radio wave received by the antenna 7 is introduced to the IF
unit 3 via the circulator 8A, the LNA 38, and the D/C 39. At this
time, the D/C 39 converts the signal in the submillimeter or
millimeter band into an IF signal.
The signal input to the IF unit 3 is gain-adjusted by the AGC 37
and then the resultant signal is input to the DEM (demodulation
unit) 43 in the indoor equipment 31.
In explanation of the external appearance of the entire system
body, as described above, the case 5 is formed nearly in a square
in the plan view. The external appearance does not change even if
the entire system is rotated at 90.degree. intervals with respect
to the waveguide input/output unit 8D acting the center thereof. In
other words, even if the entire system is arranged so as to receive
a vertical polarized wave, as shown in FIG. 4(a) or a horizontal
polarized wave, as shown in FIG. 4(b), the external appearance does
not change. Namely, the horizontal/vertical polarized wave
conversion, which is performed in the installation field to avoid
interference between sets of adjacent equipment with the same
frequency bands, can be simply performed by rotating the entire
system at 90.degree..
On the other hand, as shown in FIGS. 2, 5, 6(a), and 6(b), an
external interface connector 15 is connected to the system body. A
rifle scope 16 acting as a positioning member is arranged as shown
in FIGS. 5, 6(a), and 6(b). As shown in the figures, the rifle
scope 16 and the connector 15 are arranged on the diagonal line L
on the end surface of the case 5, coaxially around the mounting
center portion O of the antenna 7.
Hence, as shown in FIGS. 6(a), and 6(b), the system body is
equipped with the connector 15 arranged downward with respect to
the right or left of the case 5 and the rifle scope 16 positioned
over the case 5. As a result, even after the location of the system
body 1, the horizontal/vertical conversion can be performed merely
by rotating the system body 1 at only 90.degree..
The case 5 and the cover member 6 acting as a housing for the
system body is made of a good conductive and heat-resistance member
such as aluminum.
The antenna integral-type transmitter/receiver system according to
the first embodiment of the invention has the above-mentioned
structure. Hence the printed wiring board 12 can be integrated and
the number of constructive components or electrical connecting
parts can be reduced, so that the system can be compacted and
thinned.
Since the electrical circuit units of the first unit 10 and the
second unit 11 are arranged on the common printed wiring board 12,
plane assembling is possible, thus remarkably improving the
manufacturing ability and assembly ability.
FIG. 1 shows the configuration in which the waveguide filter 8B is
used for the waveguide circuit portion 8. However, instead of the
waveguide filter 8B, a dielectric filter can be used to simplify
the configuration.
The conductors of the main electrical circuit units 2, 3, and 4 are
integrally put together on the single printed wiring board 12
within the case 5. Thus it becomes easy to make the system external
appearance be symmetrically to the vertical and horizontal
directions with respect to the connecting portion as the center of
the waveguide input/output unit 8D for the antenna 7. Hence, the
horizontal/vertical polarized wave conversion can be simply
established without changing the external appearance by rotating
the entire system at 90.degree. with the antenna 7 mounted, whereby
the horizontal/vertical conversion waveguide is not needed. As a
result, a small, slim, cost reduced system can be realized.
In the above-mentioned example, a rifle scope is explained as the
positioning member 16. However, a maintenance spare connector, for
example, may be used instead of the positioning member 16, without
being restricted to the rifle scope.
A modified example of the first embodiment according to the present
invention will be explained next.
In an explanation of the first modified example, as shown in FIG.
8, a trench (or groove) 5C being a clearance for leads and
assembling components on the printed wiring board 12 and the
division portion 5D for avoiding interference between units in the
printed wiring board 12 are formed on the fixing surface of the
printed wiring board 12 within the case 5. The case 5 is formed as
a shield cover, together with the trench 5C and the division
portion 5D, so that no need of the shield cover allows the entire
system to be small-sized and light-weighted.
Next, in an explanation of the second modified embodiment, as shown
in FIG. 9, a metal base member 17 is arranged between the case 5
and the printed wiring board 12. The trench (or groove) 5C and the
division portion 5D are formed as a shield cover in the base member
17. In such a structure, even if a change in the performance
specification or remodeling of the system results in a modification
in electrical components for the printed wiring board 12 or
replacing the printed wiring board 12 with a different one, a mere
replacement of the base member 17 can deal with the
modification.
Thus, there is an advantage in that a general-purpose case 5 can be
used without subjecting the case 5 to any change. In other words,
the specification change and remodeling can be quickly dealt at low
cost.
Next, in an explanation of the third modification, the case 5, the
RF unit 2, and the housing unit 2A are integrally formed as shown
in FIG. 10. The MIC 19 or similar things is arranged within the RF
housing unit 2A.
The structure of the system enables the reduced number of
components and improved assembling ability.
Next, the fourth modified embodiment will be explained below. As
shown in FIG. 11, the sheet heater 18 is arranged inside the cover
member 6 in the system body 1.
The sheet heater 18 can easily warm electrical components within
the case 5. For example, the system can be installed outdoors in
cold districts. Moreover, the system for a general specification
can be changed into that for cold regions merely by arranging the
sheet heater 18 on the cover member 6. Hence there is an advantage
in that systems for different specifications can be manufactured at
low cost.
The antenna integral-type transmitter/receiver system according to
the present invention is mainly installed outdoors. The
installation examples will be explained using FIGS. 15 to 19. FIGS.
15 and 16 are diagrams each showing the first installation example.
In the first installation example, the device mounting fitment 20
is arranged between the housing 5 and the antenna 7 of the system
body 1.
As shown in FIG. 16, the device support member 21 is arranged on
the support 24 used to install the system body 1. The system can be
arranged by mounting the device mounting fitment 20 on the device
support member 21.
An attitude adjusting unit 25 is arranged to the device support
member 21 to adjust the attitude of each of the antenna 7 and the
system body 1. The attitude adjusting unit 25 can adjust vertically
and horizontally the angle of the system. The horizontal direction
of the system can be adjusted by rotating, for example, the support
24. Thus the antenna 7 and the system body 1 can be held in the
attitude suitable for transmission and reception.
As shown in FIG. 16, a sunshade cover 23 is mounted on the housing
5 of the system body 1. An antenna cover 22 is mounted to the
antenna 7. Where the system is used outdoors, the antenna cover 22
and the sunshade cover 23 protect the antenna 7 and the system body
1, respectively.
In the case of the system installation, the system body is mounted
to the support 24 by using the device mounting fitment 20 and the
device support member 21. After the support 24 is rotated at an
angle suitable for the system installation, the attitude adjusting
unit 25 adjusts the antenna 7 and the device body 1 to a desired
attitude. Hence the system body can be installed over wide ranges
without being restricted to a limited installation range.
With the system body miniaturized and slimmed, there is an
advantage in that the system can be installed with the simplified
support mechanism.
Next, the second installation example of the system body will be
explained with FIG. 17. In this case, the system is installed by
mounting the device mounting fitment 20A to the cover member 6
arranged on the back surface of the system body 1. Likewise, the
attitude adjusting unit 25A is arranged to the system support
member 21A, whereby the antenna 7 and the system body 1 can be
adjusted in a desired attitude.
In the second installation example, the device mounting fitment 20A
is mounted on the back surface of the system body 1. Thus there is
an advantage in that the system body can be easily installed.
Next, the third installation example of the system body will be
explained. In this installation example, as shown in FIGS. 18(a)
and 18(b), the nearly U-shaped fitments 21B and 21D are arranged on
the lower surface of the housing 5 so as to face to each other. As
shown in the figures, fitments 21B and 21D are connected via a pin
pivotablly or rotatably.
The attitude adjusting unit 25B is formed with the pin connecting
unit. The attitudes of the antenna 7 and the system body 1 can be
adjusted by bonding the fitment 21B to the lower surface of the
housing 5 with volts or the like. In such a system installation,
the system can be installed in such a way that other device
mounting fitments and device support member do not protrude toward
the cover member 6 on the back surface of the system body.
As shown in FIG. 18(b), the fitment 21B is bonded with the side
surface of the case 5 of the system, by forming the metal fitting
bolt holes in the side surface. Thus the vertical/horizontal
polarized wave conversion is performed according to the condition
of the system installation.
As described above, in the third installation example, since any
mounting members are not arranged on the back surface of the system
body 1, the system can be installed without occupying the place in
the deep direction. Hence there is an advantage in that the system
body can be installed in a narrow space and the vertical/horizontal
polarized wave conversion can be simplified.
Finally, the fourth installation example of the system body will be
explained as shown in FIG. 19. In this installation example, like
the third installation example, the device mounting fitment 20C is
formed so as to cover the side surface of the housing 5. The device
mounting fitment 20C and the device support member 21C are
rotatably connected to the side surface of the housing 5. The
angles in the vertical direction can be adjusted with respect to
the connection portion being the center thereof.
As described above, there is an advantage in that the system body
can be installed without occupying the place in the deep direction,
and installed vertically in a compact form.
In either installation example described above, down-sizing and
slimming the system allows the system installation using a simpler
support mechanism.
The attitude adjusting unit 25, 25A to 25C can be rotatably formed
with respect to two axis directions including the center axis of
the support 24 and the axis perpendicular to the center axis. Even
when the support member 24 is fixed, the attitude of the antenna 7
can be easily adjusted after an installation of the system.
The installation of the system should not be limited to the first
to fourth installation examples. The system is widely applicable to
other installation examples.
(b) Explanation of the second embodiment:
Next, explanation will be made as to the antenna integral-type
transmitter/receiver system according to the second embodiment of
the present invention. FIG. 12 is a disassembled perspective view
showing schematically the entire structure of the antenna
integral-type transmitter/receiver system.
As shown in FIG. 12, in the second embodiment, contrary to the
configuration of the first embodiment, the waveguide circuit unit 8
and the printed wiring board 12 are arranged in the case 5 in the
order of the waveguide circuit unit 8 and the printed wiring board
12 from the mounting surface 5A of the antenna 7 on the case 5. In
other words, the elements are housed in the reverse order to that
in the first embodiment. Other elements are substantially similar
to those in the first embodiment.
That is, the waveguide circuit unit 8 is constituted of a
circulator (CIR) 8A, a waveguide filter 8B, and an antenna coupling
waveguide 8C. The transmit/receive function unit 13 is formed of
the RF unit 2, the IF unit 3, and the waveguide circuit unit 8. The
antenna 7 is connected to the transmit/receive function unit
13.
The opening 5B is formed in the other end surface of the case 5.
The case 5 houses the RF unit 2, the IF unit 3, the PS unit 4, and
the waveguide circuit portion 8.
The waveguide circuit unit 8 and the RF unit 2 provides the first
unit 10. The IF unit 3 provides the second unit 11. As shown in
FIG. 12, the first unit 10 and the second unit 11 are arranged in a
stacked form in the case 5 of the transmitter/receiver system body
1.
As shown in FIG. 12, the direction of the RF unit 2 arranged to the
case 5 is the same as that in the first embodiment. The printed
wiring board 12 is arranged in a stacked form on the side of the
cover member 6 of the RF unit 2.
The IF unit 3 and the PS unit 4 (and, if necessary, the bias
electrical circuit portion of the RF unit 2) are integrally
arranged on the single printed wiring board 12. The electrical
circuit units in the first unit 10 and the second unit 11 are
arranged on the common printed wiring board 12. The conductors for
the main electrical circuit portions 2, 3, and 4 are summed up.
As described above, since the printed wiring board 12 is housed in
the back side of the mounting surface 5A of the antenna 7, the
opening 14, described with the first embodiment, is not formed in
the middle of the printed wiring board 12. The waveguide circuit
portion 8 is connected directly to the antenna 7.
The antenna integral-type transmitter/receiver system according to
the second embodiment of the present invention has the
above-mentioned structure. Hence the effect substantially identical
to that of the first embodiment can be obtained. Since the opening
14 which is formed in the middle portion of the printed wiring
board 12 to connect the waveguide circuit portion 8 with the
antenna 7 is not needed, the printed wiring board 12 can be
effectively utilized. Moreover, since the waveguide circuit unit 8
does not penetrate the printed wiring board 12, there is an
advantage in that the freedom in size of the height of each of the
IF unit 3 and the PS unit 4 increases.
The second embodiment may be constituted as the first to fourth
modifications of the first embodiment.
It may be considered that the case 5, the RF unit 2, and the
housing unit 2A are integrated and the MIC 19 is arranged inside
the RF housing unit 2A. The sheet heater 18 may be arranged inside
the cover member 6 of the system body 1.
The antenna integral-type transmitter/receiver system of the second
embodiment can be arranged as that of the first embodiment (refer
to FIGS. 15 to 19).
(c) Explanation of the third embodiment:
Next, the antenna integral-type transmitter/receiver system
according to the third embodiment of the present invention will be
explained. FIG. 13 is a cross-sectional view showing schematically
the internal structure and corresponds to FIG. 3.
In the third embodiment, only the structure of the antenna 7 is
different from those in the first and second embodiments. As shown
in FIG. 13, in this example, the plane antenna 7A is mounted in
place of the conventional antenna 7.
In the plane antenna 7A, the feeder substrate 7D is sandwiched in
the foam dielectric 7B. The antenna radome 7C covers the foam
dielectric 7B and the feeder substrate 7D. The plane antenna 7A is
mounted on the antenna mounting surface 5A of the case 5.
The antenna mounting surface 5A of the case 5 acts as the ground
conductor for the plane antenna 7A. Hence the antenna mounting
surface 5A is made of aluminum or similar material. The antenna
mounting surface 5A is used as a base plate to satisfy the strength
of the plane antenna 7A.
The plane antenna 7A may have either structure shown in the first
or second embodiments. The juncture for coupling between the
antenna 7A and the transmit/receive function unit 13 may be
positioned at a place other than the center of the system body
1.
Since the antenna integral-type transmitter/receiver system
according to the third embodiment of the present invention is
constituted as the above-mentioned plane antenna integral-type
transmitter/receiver system, the effect similar to those of the
first and second embodiments can be obtained. Moreover, a slimmer
transmitter/receiver system can be manufactured at low cost.
Moreover there is an advantage in that the entire system has a good
external appearance.
The antenna integral-type transmitter/receiver system according to
the third embodiment can be installed as seen in the first
embodiment (refer to FIGS. 15 to 19).
(d) Explanation of the fourth embodiment:
Next, the antenna integral-type transmitter/receiver system
according to the fourth embodiment of the present invention will be
explained. FIG. 14 is a perspective view showing schematically the
entire configuration.
In the present embodiment, as shown in FIG. 14, a surface of the
case 5 acting as a housing is formed as the main reflector of the
antenna 7. Namely, the case 5 itself acts as a parabola antenna
7.
The interior of the system is constituted as explained with the
first and second embodiments.
The antenna integral-type transmitter/receiver system according to
the fourth embodiment of the present invention is constituted like
the above-mentioned structure. Hence the effect substantially
similar to those of the first and second embodiments can be
obtained and the system can be miniaturized and slimmed so that the
number of the components can be reduced.
The antenna integral-type transmitter/receiver system according to
the fourth embodiment can be installed as seen in the first
embodiment (refer to FIGS. 17 to 19).
(e) Explanation of the fifth embodiment:
Next, the antenna integral-type transmitter/receiver system
according to the fifth embodiment of the present invention will be
explained. FIG. 20 is a disassembled perspective view showing
schematically the entire configuration. FIGS. 21 and 22 are
cross-sectional views each showing schematically the internal
constructions. FIG. 23 is a front view showing the external
appearance. FIG. 24 is a rear view showing the external appearance.
FIG. 25 is a partial cross-sectional view showing the external
appearance.
In the fifth embodiment, as shown in FIG. 22, the IF unit
(intermediate frequency electrical circuit unit) 3 is included
inside the case (housing) 105 with one end surface opened. The base
plate 117 is arranged so as to face the opening 105A of the case
105. The end surface of the case 105 is closed. Thus an antenna
integral-type transmitter/receiver system is constituted.
The waveguide circuit unit 8 and the RF unit (high-frequency
electrical circuit portion) 2 are mounted on the side surface of
the case 105 of the base plate 117. The opposite side surface of
the case 105 of the base plate 117 is formed as the antenna
mounting surface 117A. Like the IF unit 3, the PS unit 4 is
arranged inside the case 105.
Hence, in the antenna integral-type transmitter/receiver system
according to the present embodiment, as shown in FIG. 22, the IF
unit 3, the waveguide circuit unit 8, and the RF unit 2 are exposed
by separating the case 105 from the base plate 117. The band
splitting filters 8B and 8E can be easily exchanged without
detaching the assembled units 2, 3, and 8 from the case 105, so
that maintenance and inspection can be simply performed. The case
105 is formed of a synthetic resin material such as FRP.
As shown in FIGS. 24 and 25, the through-hole portion 80
corresponding to a waveguide is formed in the antenna mounting
surface 117A of the base plate 117. The through-hole portion 80 is
used as the input/output unit on the side of the equipment (or
antenna interface unit).
That is, as shown in FIG. 25, the waveguide 8C is connected to the
antenna 7 through the through-hole 80. The packing member 82 such
as a hermetic window 81, e.g. mica, and an O-ring is arranged
between the base plate 117 and the waveguide 8C. As shown in FIG.
20, in fact, the recess portion 80A is formed around the
through-hole portion 80 of the base plate 117.
As shown in FIGS. 20 to 23, the display window 60 is formed in the
closed surface of the case 105 of the system. The display window 60
is formed by arranging an opening 61 for the display window in a
part of the closed surface of the case 105 and covering the opening
61 with the transparent member 62 such as transparent acrylic
material or glass. This display window 60 allows the display
content of the display unit 70 included in the case 105 to be
confirmed.
The display unit 70, as shown in FIGS. 20 and 23, which consists of
the LED 71, the level meter 72, and the check terminal 73 displays
the receiving sensitivity and the device operational condition.
As shown in FIG. 24, the antenna mounting surface 117A on the base
plate 117 is formed as the device mounting fixture 90. The device
mounting fixture 90 is a member used to mount the system fixed and
used indoors and outdoors. Even if the stiffness of the case 105 is
designed low, sufficient durability can be realized by arranging
the fixture 90 to the base plate 117.
The structure (refer to FIGS. 24 and 25) including the through-hole
80 corresponding to the waveguide formed in the antenna mounting
surface 117A of the base plate 117 and antenna 7 connected to the
waveguide 8C via the through-hole 80 is applicable to the first to
fourth embodiments.
In the antenna integral-type transmitter/receiver system according
to the fifth embodiment of the present invention, as described
above, the IF unit 3 and the PS unit 4 are included on the side of
the case 105 and the waveguide circuit portion 8 and the RF unit 2
are mounted on the side surface of the case 105 of the base plate
117 used to close the case 105. Thus the IF unit 3, the waveguide
circuit unit 8 and the RF unit 2 can be separated from the side of
the case 105 and the side of the base plate 117. These units can be
assembled and adjusted in different steps.
That is, at the time of the specification modification of the
system, particularly, the exchange of the band splitting filters 8B
and 8E associated with frequency changes, it is unnecessary to
disassemble all assembled units. As a result, the number of steps
needed to the specification modification can be reduced.
The case 105 is required only to have as degree as the strength
with which the IF unit 3 and the PS unit 4 can be held, by mounting
the device fixture 90 on the side of the antenna mounting surface
117A of the base plate 117. Hence, it is possible to use a
synthetic resin material such as FRP so that the system can be made
in lightweight and at low cost.
The specially-shaped flange and the hermetic window flange for
fixing the base plate 117 (corresponding to the case 5 in other
embodiments) are not needed by forming the through-hole 80
corresponding to the waveguide in the antenna mounting surface 117A
and using the through-hole 80 as the input/output unit 8D on the
system side. Thus the low manufacturing cost and improved
assembling capability can be established.
Moreover, conventionally, unless components such as the RF unit 2,
the IF unit 3, and the PS unit 4 are prepared, the system assembly
work cannot be made progress. However, according to the present
system, the assembling work advances in parallel on the side of the
case 105 and the side of the base plate 117, whereby the work
efficiency can be improved.
The structure which includes the display window 60 formed in the
end surface facing the opening 105A of the case 105 and the display
unit 70 included within the case 105 to display through the display
window 60 allows the system body to have the necessary display
functions (the signal receiving level display, a transmission
output level, and the confirmation display for a primary power
supply or the like needed in an antenna direction adjusting
operation at the time of the installation of a transmitter and
receiver unit or a periodical maintenance work). Thus it is
possible to remove the exclusive external display.
(f) Others:
As shown in FIG. 26, the external side surface 117B or 5B in the
base plate 117 or the case 5 may be formed as coupling surface to
other devices. The waveguide 8C may be connected to other devices
through the through-hole 80.
In this case, the internal structure of the device (the left side
to the base plate 117 in the figure) viewed from the through-hole
80 is not shown particularly. However, the system may have the
internal structure shown in any one of the first to fifth
embodiments.
That is, as shown in FIG. 1, in the internal structure, the first
unit 10 having the waveguide circuit portion 8 and the RF unit 2
and the second unit 11 having the IF unit 3 are arranged in a
stacked form within the housing 5, or the printed wiring board 12
and the waveguide circuit portion 8 each having the electrical
circuit portions of the first unit 10 and the second unit 11 are
arranged in the housing in order of either the printed wiring board
12 and the waveguide circuit portion 8 or the waveguide circuit
portion 8 and the printed wiring board 12. As shown in FIGS. 20 to
22, the structure may include the waveguide circuit unit 8 and the
RF unit 2 arranged on the base plate 117, in addition to the IF
unit 3 included in the case 105.
INDUSTRIAL APPLICABILITY
As described above, the antenna integral-type transmitter/receiver
system according to the present invention is useful as a small,
lightweight antenna integral-type transmitter/receiver system, and
suitable mainly for an antenna integral-type transmitter/receiver
system installed outdoors.
* * * * *